Hopefully you're not implying that you could heighten silent image to 9th and then shadowcraft it into a 9th level evocation or conjuration spell... because the class ability doesn't work that way... you're silent image may be cast as a 9th level spell but your still limited to it's original spell level for determining the spells you can mimic with it... of course the mimic'd spell is cast as 9th level still though.

Hopefully you're not implying that you could heighten silent image to 9th and then shadowcraft it into a 9th level evocation or conjuration spell... because the class ability doesn't work that way... you're silent image may be cast as a 9th level spell but your still limited to it's original spell level for determining the spells you can mimic with it... of course the mimic'd spell is cast as 9th level still though.

Of course not; that's not how that works at all. Heightening to 9th only lets you emulate an 8th-level spell.

Okay, but seriously:

Quote from: Heighten Spell, Benefit

A heightened spell has a higher spell level than normal (up to a maximum of 9th level). Unlike other metamagic feats, Heighten Spell actually increases the effective level of the spell that it modifies. All effects dependent on spell level (such as saving throw DCs and ability to penetrate a lesser globe of invulnerability) are calculated according to the heightened level. The heightened spell is as difficult to prepare and cast as a spell of its effective level.

Bolding mine of course. This is half the power base for the Shadowcraft Mage. If an ability that explicitly checks a spell's level somehow isn't "dependent on spell level", then what is?